Great comparison! Thanks for doing this. I’m using a solid metal duct. Wonder what that will sound like. But I ordered the filter, the duct is a backup.
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Whew. Had me worried there about how that story was going to turn out for a bit.
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The other thing you can do is wrap it in fiberglass insulation if you don’t mind bulking it up a bit. Standard wall stuff or the thinner water heater kind will both cut the resonance and absorb noise even more.
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A few things:
- The more noise coming out of the tube, the less in your house
- if you are able to run another angle at the end of the pipe, you can bounce the noise coming out the tube down to a soft, noise absorbent material on the ground
- wrapping the portion of the tube thats inside the house with bubble wrap or insulation will massively reduce the noise you hear inside (I am one with the Forge, the Forge is one with me)
I personally prefer the more rigid/smooth interior walled tubing because it keeps the sound in better, and keeps cfm higher.
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WOW that is a WORLD of difference thanks so much for doing this. I’m sure that is going to put allot of condo dwellers at ease
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Very cool! For anyone who doesn’t have one yet: The noise isn’t that loud to begin with…far less than an old school dish washer
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Inside? At least mine is plenty loud when cutting.
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Yeah; it’s a semi-loud whirring sound, but definitely quieter than a 2003 dish washer that I have.
I can stand 4 or 5 feet away, in a small room, and have a phone conversation…not really wonderfully, but definitely doable…
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Wow, my 2006 you have to check the light to see if it’s running. The GF I can hear in other rooms.
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Thanks for running and documenting that test! The latter test with the softer hose sounds a lot better than the one with rigid pipe but I’m also wondering why the flow rate seemed to drop so much in the second test. Is it possible that the soft hose was leaking inside somewhere, presumably at the hose connections?
The walls of those tubes aren’t smooth. They cause a lot of turbulence, especially around turns
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Fantastic experiment. I’m debating cutting a dedicated vent in my wall or using a window vent, and had been wondering how to pick tubing. This will help!
Wonder if this would work?
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Going to guess not. Says it’s not for kitchen exhaust systems. Heating and A/C systems, the intended use, don’t put out any particulate or flammable gasses. Looking at the smoke from the GF reminds me of the nasty stuff that gets vented from my cooking.
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Good point! I was thinking it would be OK with the heat, wasn’t thinking about the smoke.
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I don’t know, offhand, what year my dishwasher is as it came with the apartment. It can be heard in another room, though. I’m more concerned about the comparative volume of the pro with filter as I try not to be too noisy for my neighbors. I have my coffee grinder in a box with some padding because I am convinced that the burr mill can be heard in the next building over without it.
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Good point. It would be interesting to see a flow rate vs delta P curve for the GF fan, but GF doesn’t seem to release technical data of that sort.
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After I did this experiment I realized I totally should have put a flow meter in the test too, but given the amount of blood loss in quickly changing over the duct in the walls, not excited to try again…
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Good lord - you actually have the hardware to measure exhaust velocity? You’d be a fun neighbor with your vast collection of gadgets!
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